Mark Steyn, National ReviewIf you had buttonholed me in the Senate men&rsquo;s room circa 2003 and told me that a decade hence Joe Biden would be America&rsquo;s vice president, John Kerry secretary of state, and Chuck Hagel secretary of defense, I&rsquo;d have laughed and waited for the punch line: The Leahy administration? President Lautenberg? Celebrate lack of diversity! But even in the republic&rsquo;s descent into a Blowhardocracy staffed by a Zombie House of Lords, there are distinctions to be drawn. Senator Kerry having been reliably wrong on every foreign-policy issue of the last 40 years, it…